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/* Copyright (C) 2008-2022 Free Software Foundation, Inc.
Contributed by Richard Henderson <>.
This file is part of the GNU Transactional Memory Library (libitm).
Libitm is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<>. */
/* The following are internal implementation functions and definitions.
To distinguish them from those defined by the Intel ABI, they all
begin with GTM/gtm. */
#ifndef COMMON_H
#define COMMON_H 1
#define UNUSED __attribute__((unused))
#define ALWAYS_INLINE __attribute__((always_inline))
# define HIDDEN __attribute__((visibility("hidden")))
# define HIDDEN
#define likely(X) __builtin_expect((X) != 0, 1)
#define unlikely(X) __builtin_expect((X), 0)
namespace GTM HIDDEN {
// Locally defined protected allocation functions.
// To avoid dependency on libstdc++ new/delete, as well as to not
// interfere with the wrapping of the global new/delete we wrap for
// the user in, use class-local versions that defer
// to malloc/free. Recall that operator new/delete does not go through
// normal lookup and so we cannot simply inject a version into the
// GTM namespace.
// If separate_cl is true, the allocator will try to return memory that is on
// cache lines that are not shared with any object used by another thread.
extern void * xmalloc (size_t s, bool separate_cl = false)
__attribute__((malloc, nothrow));
extern void * xcalloc (size_t s, bool separate_cl = false)
__attribute__((malloc, nothrow));
extern void * xrealloc (void *p, size_t s, bool separate_cl = false)
__attribute__((malloc, nothrow));
} // namespace GTM
#endif // COMMON_H